Abstract:
This spacecraft changes the orbit or orientation of a target object in outer space by irradiating the target object with a laser, the spacecraft having: a laser device for generating a laser; a focusing means for focusing the laser; a detection means for obtaining detection information which includes the distance between the spacecraft and the target object; and an irradiation control means for controlling the focusing means in a manner such that the laser is focused on the target object on the basis of said distance.
Abstract:
A gas detection device (10) for detecting difluoromethane, which is present in an object space at a distance, according to the present invention is provided with a detection unit (22). The detection unit (22) detects difluoromethane, which is present in the object space at a distance, by utilizing absorption of light that has a specific wavelength within one wavelength range among first to sixth wavelength ranges.
Abstract:
This spacecraft changes the orbit or orientation of a target object in outer space by irradiating the target object with a laser, the spacecraft having: a laser device for generating a laser; a focusing means for focusing the laser; a detection means for obtaining detection information which includes the distance between the spacecraft and the target object; and an irradiation control means for controlling the focusing means in a manner such that the laser is focused on the target object on the basis of said distance.
Abstract:
This direct-current bus control system for controlling power variation in a direct-current bus connecting an input power supply and a load comprises: a main stabilization device including a first charge/discharge element and a first power converter; and at least one sub-stabilization device including a second charge/discharge element, a charge element, or a discharge element and a second power converter. The first power converter is configured to determine a bus voltage target value corresponding to a stored electricity amount index of the first charge/discharge element, and is configured to bilaterally exchange direct-current power between the first charge/discharge element and the direct-current bus in such a way that the voltage of the direct-current bus matches the bus voltage target value. The second power converter is configured to determine a current target value in accordance with a difference between a threshold value relating to charging or discharging of the second charge/discharge element, the charge element, or the discharge element and the voltage of the direct-current bus, and is configured to exchange direct-current power between the second charge/discharge element, the charge element, or the discharge element and the direct-current bus in such a way that a current equal to the current target value flows through the second charge/discharge element, the charge element, or the discharge element.
Abstract:
This direct-current bus control system for controlling power variation in a direct-current bus connecting an input power supply and a load comprises: a main stabilization device including a first charge/discharge element and a first power converter; and at least one sub-stabilization device including a second charge/discharge element, a charge element, or a discharge element and a second power converter. The first power converter is configured to determine a bus voltage target value corresponding to a stored electricity amount index of the first charge/discharge element, and is configured to bilaterally exchange direct-current power between the first charge/discharge element and the direct-current bus in such a way that the voltage of the direct-current bus matches the bus voltage target value. The second power converter is configured to determine a current target value in accordance with a difference between a threshold value relating to charging or discharging of the second charge/discharge element, the charge element, or the discharge element and the voltage of the direct-current bus, and is configured to exchange direct-current power between the second charge/discharge element, the charge element, or the discharge element and the direct-current bus in such a way that a current equal to the current target value flows through the second charge/discharge element, the charge element, or the discharge element.
Abstract:
A stable wavelength selecting action is realized by controlling a laser wavelength to permit a fast wavelength sweeping without mechanically turning a heavy-mass member. A laser device comprising a laser resonator including a mirror (12) having a specified transparency and an adaptive optics (10) provided with a mirror capable of controlling the reflection angle and wave front of a reflection light and allowing an incident light to reflect by applying an active change to it, a laser medium (14) disposed in the laser resonator, and a dispersion element (16) for receiving an output light from the laser medium.
Abstract:
A method of evaluating a non-linear optical crystal used for the non-linear wavelength conversion of laser beams which enables the non-linear optical crystal to be evaluated before the crystal is actually used as a wavelength conversion element in order for the crystal to be constantly used for an extended time with a high conversion efficiency retained and without lowering in output when non-linear optical crystals for various non-linear wavelength conversions such as a CLBO crystal are used to convert laser beams, wherein the non-linear optical crystal is moved to change a laser beam incident position to detect the output of a laser beam emitted from the non-linear optical crystal for each changing position.
Abstract:
To provide a gas analysis device comprising: a cell; a light source; and a detector, wherein two or more types of gaseous components contained in the gas are measurement targets, a mid-infrared light with a wavelength that is caused to match the absorption spectrum of the measurement target gaseous components is output from the light source, and concentrations of the gaseous components are obtained based on light intensity detected by the detector. The gas analysis device sets a cumulative measurement time for the mid-infrared lights with the wavelengths for respective ones of the measurement target gaseous components; and controls at least one of an output time of the light source and a detection time of the detector in accordance with the cumulative measurement times, thereby efficiently measuring the plurality of types of gaseous components contained in the gas by using the mid-infrared lights with the plurality of wavelengths.